Alarm-shield.



G. J. COLEMAN.

ALARM SHIELD.

APPLICATION FILED MAY 25, 1910.

1,096, 11 3. Patented May 12, 1914.

3 SHEETS-SHEET 1.

fig] 47 46 112 van for:

091C250 ne y.

Witnesses:

G. J. COLEMAN. ALARM SHIELD.

APPLIUATION FILED mus, 1910.

1,096,41 3. Patented May 12, 19m

3 8EEETBSHBET 2.

Q Z'Znaamesz: E y- Z lnvenfiar- COLUMBIA vLANoGnArH COQWASHXNHTONI I)v c= G. J. COLEMAN.

I ALARM SHIELD.

APPLICATION FILED MAY 25, 1910.

Patented May 12, 1914.

a sums-51mm 3.

AA M Q Y Wiinesses:

coLlmilA PLANOGIAPH c0 INGION. D. c.

UNITED STATFS PATENT OFFICE.

CLYDE J. COLEMAN, OF NEW YORK, N. Y., ASSIGNOR- TO NEW YORK SAFETY CHEST COMPANY, A CORPORATION OF NEW YORK.

ALARM- SHIELD Specification of Letters Patent.

Application filed May 25, 1910.

Patented May 12, 1914.

Serial No. 563,244.

T all whom it may concern Be it known that I, CLYDE J. COLEMAN, a citizen of the United States, residing at No. 203 Vest One Hundred and Seventeenth street, in the city, county, and State of New York, have invented a new and useful Improvement in Alarm-Shields, of which the following is a specification.

This invention relates to alarm means for protecting the portion of a safe, vault or similar structure liable to attack. The door or closure of a safe or vault is the portion usually attempted to be drilled or penetrated by heat, and the combination carried by the closure may be variously tampered with.

Consequently itis the object of the invention to protect the safe closure, and preferably even the outside door-lines.

More particularly, the object of the invention is to provide a shield adapted to cover a safe closure and the operating handles or knobs thereon, which will protect the safe by causing an alarm, preferably a repeating cartridge alarm, to be sounded should the shield be tampered with. Accordingly, I provide means whereby the alarm is actuated by removal or attempted removal of the shield, by distortion thereof, by excersively heating the shield, or by penetration thereof, either by heat or by a penetrating tool.

A further object of the invention is to provide means whereby the shield may be detachably secured in position covering the safe closure.

A still further object is to provide the shield with an effective and novel form of sounding alarm.

lVit-h these and other objects in view, the invention consists in the parts, combination, and arrangements hereinafter more fully pointed out.

In the accompanying drawings, Figure 1 is a vertical axial section through the shield applied to the front of a safe; Fig. 2 is a rear View of the shield, part of the casing containing the alarm. and other parts being broken away; Fig. 3 is an axial section through the cartridge alarm; Fig. Al is an end view thereof; Fig. 5 is a cross-section therethrough; Fig. 6 is an axial section,

broken away, showing the hammer in firing position; Fig.1 is a detail showing one of the jacks for mechanically connecting the alarm to the shield and electrically connecting the tripping magnet to the outside circuit; Fig. 8 is a. detail showing the means whereby the alarm when actuated breaks the circuit; and Fig. 9 is a detail cross-section through the spring for driving the cartridge carrier and the parts encircled by the spring.

In Fig. 1, the numeral 2 indicates a safe, vault or the like, of which 3 is the door, 4: the door lines, and 5 the combination knob. It should be understood hereinafter that whenever I use the term safe I intend to include vaults or other similar structures. The shield 6, of suitable form, and having imperforate walls, covers the safe closure, in-

cluding the combination knob or handle 5, the bolt handle (not shown), and the door lines l. I provide means for removably securing the shield in guarding position over the front of the safe, which means may be widely varied. I have illustrated two hooks 7 adapted to engage the stems of the combination and bolt handles. Each hook T is secured to a horizontal rod 8, which is connected to the shield by a stout spiral spring 9. The tendency of the spring is to draw the hook 7 forward against the back of the operating knob, thus holding the shield close against the front of the safe. As shown, the spring 9 may be secured to a bracket 10, which in turn is secured to a casing 11, secured in its turn to the inner wall of the shield proper. A vertical coil spring 12 secured to each rod 8 and the easing 11 constitutes one of the forms that may be employed of yielding means for holding the shield against sagging. It will be obvious that sagging or lowering of the shield will tend to elongate this spring 12, because the rod 8, to which the upper end of the spring is secured, is supported by the safe, while the lower end of the spring descends with the shield. The spring is strong enough to resist this tendency, and so holds the shield against sagging. In order to enable the members 7 to engage properly with various operating handles, I make them adjustable; and tothis end I may as illustrated swivel them on nuts 13 threaded on the rods 8. Suitable handles 1 L may be secured to the shield to facilitate the attachment and removal thereof.

In Figs. 1 and 2 the alarm, which will be specifically described hereinafter, is indicated by the numeral 15. I provide means whereby this alarm is actuated when the shield is tampered with. The illustrated embodiments of these means, which may be widely varied, will now be described.

I shall first describe the means employed to prevent tampering with the shield by heat.

The walls of the shield consist of an outer metal casing 16, a readily fusible, metal lining 17, as block tin or tin foil, and foraminous insulating sheets 18, as thin open mesh cloth or perforated shellacked paper, between the two. The electric circuit for actuating the alarm may be traced from battery 19, or any other suitable source of current, along wire 20 to casing 16, on the one hand, and, on the other hand, through alarm 15, along wire 21 to one of two stationary contacts 22, through movable contact 23, to the other stationary contact 22, along wire to binding post 2:", which is insulated from the casing 16, and thence to the lining 17. It will be clear. therefore, that an attempt to penetrate the shield by use of an oXy-acetylene flame or an electric arc will cause the lining 17 to fuse and contact with the casing 16, thus closing the circuit and causing the alarm to operate. Likewise, the use of a penetrating tool will connect the lining and easing. Or an attempt to draw the temper of the stem of the combination lock 26 will fuse the lining 17, with the same result. The combination lock 26 serves to keep the movable contact 23 between the stationary contacts 22, but it may be manipulated by one familiar with the combination to permit the spring 27 to withdraw the contact 23. In other words, I provide a combination lock switch whereby the alarm mechanism may be rendered inoperative. This permutation lock switch may be of any suitable usual. construction. Such devices are wellknown and inasmuch as its specific construction is immaterial, particular illustration is unnecessary. It is preferred, however, to dispose the tumblers of the lock inside the shield and the knob or operating means outside, as indicated.

Suitable means, which will now be de scribed, are provided to prevent tampering with the shield by bending back its margin or otherwise distorting it. From the binding post 25 extend wires 28 to double-opposed stationary contacts 29. Preferably, there are four of these; and cooperating with each is a spring contact 30, normally in mid, open position. Tension wires 31 connect the contacts 30 electrically and mechanically with the four walls of the shield. In consequence, distortion of the walls of the shield, as by an attempt to bend back the margins thereof, will cause one or more of the contacts 30 to touch the corresponding contacts 29, thus completing the circuit through the alarm and causing the latter to operate.

Suitable means, which will now be de scribed, are provided to prevent tampering with the shield by bodily displacing it.

From the binding post a wire extends to the stationary contact 33 encircling the rod 8. The rod 8 carries what may be termed a universal contact, which will touch the contact 33 whatever may be the direction of the movement of the universal contact relative to the shield. As shown, this universal contact includes the two collars or enlargements Bet on the rod 8 at opposite sides of the encircling contact 33, and the portion of the rod between these collars. The rod 8, it will be seen, is electrically connected with the bracket. 10, this with the casing 11, and the casing 11 with the casing ll). It follows, therefore, that when the rod 8 touches the contact 33, the actuating circuit is completed. The spiral spring 9, it may be noted, constitutes a form of universal connection, whereby movement of the shield in any direction causes the rod 8 to touch the contact Raising or lowering of the shield, moving it to one side or the other, pushing it in or pulling it out, all have this result.

The illustrated embodiment of the alarm 15 includes a support 35, a rotatable cartridge carrier 36 mounted thereon by means of a shaft 37, a driving spring 38 secured at one end by the screw 2-39 to the support 35 and at the other end by the pin 40 to the cartridge carrier, a releasable detent 4-1., and a tripping magnet 42 for releasing the de tent.

The alarm 15 is removable; and to this end the support 35 may be attached by spring acks 13 to a wall 4% secured to casing 11. These spring jacks constitute the means for electrically connecting the magnet 42 with the outside circuit.

The cartridge carrier 36 is provided with a plurality of chambers 45 for the reception of cartridges; and a hammer to operated by a spring 47 explodes the cartridges successively as the carrier 36 revolves. This ham mer is actuated by the rotation of the carrier 36; and, as shown, the carrier may be provided with a series of lifting cams 48 that cooperate with a projection 49 on the ha1nmer to lift the latter and permit it to descend under the impulse of the spring 47, as the rim of each cartridge comes beneath the tiring projection 50. A plate 51 secured to the support 35 covers the rear end of each chamber 45 as it reaches firing position, and serves to prevent recoil of the cartridge. The firing projection 50 passes through an opening 52 in the edge of this plate so as o fire e im. of h artridge- The support 35 and the wall 44 are formed with an alined barrel 53 and opening 54, through which the burned gases escape.

I provide a double-acting lock or safety device, which, when it is positioned to permit the carrier 36 to rotate, holds the carrier against recoil and removal, and, when shifted to permit the carrier to be removed, holds the same against rotation by its driving spring. This prevents untimely firing of the cartridges. In the illustrated embodiment, this look employs an arm projecting laterally from a piece 56 that is pivoted to the support 35 by a screw 57 rotatable in said support and threaded into said piece In the position shown in Fig. 4, the arm 55 is shown as received beneath an immovable abutment mounted upon a fixed portion of the former such as the wall 44 of the casing 58, which serves to hold the carrier 36 against recoil and removal. hen the arm is shifted free of the abutment 58 it enters an opening 59 in the periphery of the carrier 36, and thus locks the latter against rotation.

The cartridge carrier can be removed from the wall 44 to a work bench for repairs or adjustment. This is accomplished by loosening the nuts on the bolts 43, when the entire carrier can be separate from the wall 44. The abutment 58 which is secured to the wall 44 prevents the removal, but by swinging the arm 55 out from under the abutment and having it engage the notch 59, the carrier can be removed from the wall. In this position of the arm 55, namely, while engaging the notch, the carrier is prevented from rotation and the rim firing pin has been thrown over the plate 51 so that accidental firing of the cartridges is impossible. Preferably, the hammer 46 is pivoted, as at 60, to this same piece 56; so that, when the arm 55 is shifted free of the abutment 58, to permit the removal of the carrier 36, the hammer is shifted out of firing position by shifting the rim firing pin over the plate 51. The manual shifting of the hammer 46 and arm 55 may be facilitated by the provision of a handle or knob 61. Thus, it will be seen that the firing mechanism may be rendered inoperative, without affecting the magnet 42, which may then be used to test the condition of the electrical apparatus.

I provide means whereby the alarm, after actuation, breaks the actuating circuit, so that loss of current is avoided. Such means may have various embodiments. In Fig. 8 I have illustrated a simple arrangement wherein the magnet circuit includes two spring contacts 62, normally touching each other, but which, at the conclusion of the revolution of the cartridge carrier 36, are separated by a projection 63 on the carrier pressing against the longer of the two contacts and forcing it away from the other.

The cartridge carrier 36 may be provided with internal gear teeth 64, meshing with teeth on a fly-wheel 65. This fly-wheel may have brake sectors 66, which under the influence of centrifugal action contact with an encircling wall 67 of the support 35, thus regulating the speed of the carrier. In the embodiment of the invention illustrated, it is this fly-wheel 65 with which the releasable detent 41 engages.

The operation of the shield has been explained with the description of the parts. The shield may be readily attached in guarding position covering the safe closure and the operating handles thereof, the members 7 being simply hooked over the combination lock stem and. the bolt stem. lVhile the shield is being positioned, the combination lock switch will be set so that the circuits are broken. so that it will be impossible accidentally to actuate the alarm mechanism. After the shield is in proper position, which may be determined by marks on the safe, the comhinatimi lock switch is turned to complete this break in the circuit. Xow any attempt to get at the portion of the safe covered by the shield, will cause the alarm to be actuated. as already explained. The person authorized to remove the shield, before doing so. will again set the combination lock switch to open this break in the circuit, after which the shield may be easily and safely removed from position.

What I claim and desire to secure by Letters Patent is:-

l. in protective alarm means for safes, the combination of a shield adapted to protect a safe closure and the operating parts carried thereby, means whereby the shield may be attached in guarding position over such clcsure and detached from the safe, and alarm meclmnism carried by the shield adapted to be actuated if the shield be tampered with.

In protective alarm means for safes, a shield adapted to protect a safe closure and the operating parts carried thereby, means carried by the shield whereby the shield may be attached in guarding position over such closure and detached from such position, an alarm carried by the shield, and means whereby said alarm is actuated if the shield be tampered with.

3. In protective alarm means for safes an imperforate shield adapted to protect a safe closure and the operating parts carried thereby, means carried by the. shield whereby the shield may be attached in guarding position over such closure and detached from the safe. an alarm carried by the shield and means carried by the shield for actuating the alarm if the shield be tampered with. I

4. In protective alarm means for safes, a thin walled, hollow-back, imperforate l shield adapted to protect a safe closure and the operating parts carried thereby, means for detachably securing the shield in guarding position over such closure with its edges against the safe, said means permitting the shield to be entirely removed from the safe, and alarm mechanism carried by the shield adapted to be actuated if the shield be tampered with.

5. A detachable alarm shield constructed and arranged to be attached to a safe to cover the closure thereof, including the door-joints and the operating handles, and to be detached from such position, having an alarm carried by the shield and means whereby said alarm is actuated it the shield be tampered with.

6. A detachable alarm shield adapted to cover a safe closure and the operating handles carried thereby, having means whereby the shield may be removably supported on a projection of the safe, and alarm mechanism carried by the shield adapted to be actuated it the shield should be tampered with.

7. An alarm shield adapted to cover the closure of a safe and the ope ating handles carried thereby, having means whereby the shield may be attached to and detached from said handles, an alarm carried by the shield and means whereby said alarm is actuated it the shield be tampered with.

8. An alarm shield constructed and ar' ranged to be detachably secured in position covering a sate closure and the operating parts, having alarm mechanism carried by the shield and means independent of the safe whereby said alarm mechanism is actuated by distortion of the shield.

9. An alarm shield constructed and arranged to be detachably secured in position covering a safe closure and the operating parts, having alarm mechanism carried by the shield, means "for hanging it on the safe, and means whereby said hanging means causes actuation of said alarm mechanism if removal of the shield is attempted.

10. An alarm shield constructed and arranged to be detachably secured in position covering a safe closure and the o jierating parts. having alarm means carried by the shield. and means whereby said alarm means is actuated by penetration of the shield.

11. An alarm shield constructed and arranged to be detachably secured in position covering a safe closure and the operating parts. having alarm means carried by the shield and means whereby said alarm means is actuated by excessively heating the shield.

12. An alarm shield for safes, constructed and arranged to be detachably secured in position covering a safe closure and the operating parts having alarm means carried by the shield, including an electric circuit.

a circuit controlling device and mechanical connections between the device and the different parts of the shield whereby distortion of the shield changes the normal con dition of the circuit to actuate the alarm.

13. An alarm shield for safes constructed and arranged to be detachably secured in position covering a safe closure and the op erating parts. having alarm means carried by the shield including an electric circuit. movable contacts in said circuit, and mechanical connections between said contacts and diii'ercnt points on the walls of the shield, whereby distortion of the shield operates one or more of said contacts to change the normal condition of the circuit to actu ate the alarm.

let. An alarm shield for safes hollow at the back and constructed and arranged to be detachably secured in position covering a safe closure and the operating parts, having alarm mechanism including an electric circuit, movable contacts in said cir cuit, and tension wires connecting said coir tacts with the walls of the shield.

An alarm shield for safes hollow at the back and constructed and arranged to be detachably secured in position covering a safe closure and the operatii'ig parts, having alarm mechanism carried by the shield including an electric circuit, spring controlled contacts normally in open mid-position and adapted to close the circuit by movement in opposite directions, and connections between the walls of the shield and said contacts.

16. A removable and re ilaceable alarn'l shield for safes and the like constructed and arranged. to be detachably secured in position covering a safe closure and the operating parts, having alarm mechanism carried by the shield, including an electric circuit, and a safe-attaching supporting member within and secured to said shield adapted on movement of the shield to change the normal condition of said circuit.

17. A removable and. replaceable alarm shield constructed to cover a safe closure and the operating parts, having alarm means including an electric circuit. a resilient extensible and contractile sate-attaching and shield-supporting member carried by the shield inside the same, and means whereby said member operates said circuit upon movement of the shield.

18. An alarm shield for sates having means for detachably securing it in position covering a safe closure and the operating parts. alarm mechanism including an elec tric circuit, a safe-attacl'iing member hav ing flexible connection with said shield and means whereby movement of the shield causes said connection to change the normal condition of said circuit.

19. An alarm shield for safes adapted to be detachably secured in position covering a safe closure and the operating parts, having alarm mechanism including a normally open electric circuit, a safe-attaching member connected by a stout spiral spring to said shield and carrying a movable contact, and a stationary contact adapted to be touched by said movable contact on move ment of said safe-attaching member.

20. An alarm shield for safes constructed and arranged to be detachably secured in position covering the safe closure and the operating parts, having electrically actuated alarm mechanism carried by the shield adapted to be actuated if the shield is tampered with, and a lock switch whereby said alarm mechanism may be rendered inoperative.

21. An alarm shield for safes constructed and arranged to be detachably secured in position covering a safe closure and the op erating parts, having electrically actuated alarm mechanism carried by the shield adapted to be actuated if the shield is tampered with, and a permutation lock switch whereby said alarm mechanism may be rendered inoperative.

22. An alarm shield for safes constructed and arranged to be detachably secured in position covering a safe closure and the operating parts, having electrically actuated alarm mechanism carried by the shield adapted to be actuated if the shield is tampered with, and a permutation lock switch accessible from the outside of the shield whereby the alarm mechanism may be rendered inoperative.

23. An alarm shield for safes constructed and arranged to be detachably secured in position covering a safe closure and the operating parts, containing a repeating alarm, a mechanical motor for operating the same, a detent, and electrical means including a circuit controller connected to said shield actuated when the shield is tampered with for releasing said detent.

24. An alarm shield for safes constructed and arranged to be detachably secured in position covering a safe closure and'the operating parts, containing a repeating alarm, a mechanical motor for operating the same, a detent, electrical means including a circuit controller connected to said shield actuated when the shield is tampered with for releasing said detent, and a mechanical lock for rendering said alarm inoperative.

An alarm shield for safes constructed and arranged to be detachably secured in position covering a safe closure and the operating parts, an alarm, an electro-magnet, circuit controller and circuit adapted to actuate said alarm when the shield is tampered with, said circuit cont-roller being connected to said shield, and mechanical means whereby said alarm may be rendered inoperative without aliecting said electromagnet and circuit.

26. An alarm shield for safes constructed and arranged to be detachably secured in position covering a safe closure and the op erating parts, having alarm mechanism, electrical means including a circuit controller connected to said shield whereby said alarm mechanism is actuated when the shield is tampered with, and means whereby actuation of said alarm mechanism opens the circuit of said electrical means.

27. An alarm shield adapted to cover a safe closure and the operating parts, having alarm mechanism adapted to be actuated if the shield is tampered with, and means for detachably securing the shield over the safe closure, the same comprising a member adapted to engage behind an operating handle of the safe and spring connection between said member and the shield whereby the shield is drawn close against the safe.

28. An alarm shield adapted to cover a safe closure and the operating parts, having alarm mechanism adapted to be actuated if the shield is tampered with, and means for detachably securing the shield over the safe closure, the same comprising a member adapted to engage behind an operating handle of the safe and adjustable connection between said member and the shield whereby said member may engage various handles to hold the shield close against the safe.

29. An alarm shield adapted to cover a safe closure and the operating parts, having alarm mechanism adapted to be actuated if the shield is tampered with, and means for detachably securing the shield over the safe closure, the same comprising a horizontal rod, a member secured thereto and adapted to engage behind an operating handle of the safe, and resilient connection between the rod and shield tending to draw said member forward against the back of such operating handle.

30. An alarm shield adapted to cover a safe closure and the operating parts, having alarm mechanism adapted to be actuated it the shield is tampered with, and means for detachably securing the shield over the safe closure, the same comprising a member adapted to engage behind an operating handle on the safe, resilient means tending to draw said member forward against the back of such operating handle, and yieldable connection between said member and the shield adapted to keep the shield from sagging.

31. In protective alarm means for safes, the combination of a removable hollow shield adapted to cover a safe closure and the operating parts carried thereby, means carried by and within the shield for supporting it in guarding position against the safe, and alarm mechanism carried by the shield adapted to be actuated it the shield be tampered with.

32. In protective alarm means for safes, the combination of a hollow shield adapted to protect a safe closure and the operating parts carried thereby, means for detachably securing the shield in guarding position over the safe closure, and removable alarm mechanism carried by and within the shield adapted to be actuated it the shield be tampered with.

33. An alarm shield adapted to cover a safe closure, having removable electrically actuated alarm means and means whereby the alarm means is actuated if the shield is tampered with, a protecting circuit and members serving to connect said alarm means mechanically with the shield and electrically with the protecting circuit.

34. An alarm shield adapted to protect a safe closure, having alarm mechanism adapted to be actuated if the shield is tampered with, said mechanism including a support removable from the shield, and a sounding device, a mechanical motor for driving the same, and a tripping magnet, all carried by and removable with said support, a protect ing circuit and jacks for mechanically connecting said support with the shield and said magnet with the protecting circuit.

35. An alarm shield adapted to protect a safe closure, having a removable alarm and means whereby said alarm is actuated if the shield is tampered with, said removable alarm being carried by the shield and located between the shield and the safe and including a rotatable plural cartridge carrier and a hammer, and a double-acting locl: adapted when it permits rotation of said carrier to hold the same against removal and recoil and when shifted to permit remo ml of the carrier to lock the same against rotation.

86. An alarm shield adapted to protect a safe closure, having a removable alarm and means whereby said alarm is actuated if the shield is tampered with, said removable alarm being carried by the shield and located between the shield and the safe, and including a cartridge carrier and a hammer, a lock adapted to hold said carrier against removal and recoil, and means whereby shitting of the lock to permit removal of said carrier renders said hammer inoperative.

37. A removable and replaceable alarm shield constructed and arranged to be placed in position to cover a receptacle closure and the operating parts, said shield carrying an alarm; and means whereby said alarm is actuated by removal or attempted removal of the shield.

38. A removable and replaceable alarm shield for receptacles arranged and constructed to cover a receptacle closure and the operating parts, said shield carrying alarm mechanism including an electric circuit and a yielding member within and secured to the said shield and having means for attachment to a portion of said receptacle, so that on movement of the shield said member changes the normal condition of said circuit.

39. A removable and replaceable alarm shield for receptacles arranged and constructed to cover a receptacle closure and operating parts, having electrically actuated alarm mechanism entirely contained within the shield and adapted to be actuated if the shield is tampered with, and a lock switch whereby said alarm mechanism may be rendered inoperative.

40. A hollow, removable and replaceable alarm shield for safes constructed and arranged to cover a safe closure and the operating parts, said shield carrying entirely within it electrically actuated alarm mechanism adapted to be actuated ii. the shield is tampered with and a permutation. lock switch accessible from the outside of the shield whereby the alarm mechanism may be rendered inoperative.

41. A hollow, removable and replaceable alarm shield for safes constructed and arranged to cover a safe closure and the operating parts, said shield carrying a repeating alarm andniechanical motor for operating the same; a detent, electrical means having a circuit controller connected to the shield and actuated when the shield is tampered with for releasing said detent and a mechanical. lock for rendering said alarm inoperative.

42. A hollow, removable and replaceable alarm shield for safes constructed and arranged to cover a safe closure and the operating parts, said shield carrying alarm mechanism within it; electrical means having a circuit controller connected to the shield and adapted to actuate said alarm mechanism when the shield is tampered with; and means whereby actuation of said alarm mechanism opens the circuit of said electrical means.

43. In a protective alarm means for safes, the combination of a removable and replaceable hollow shield, adapted to protect a safe closure and the operating parts carried thereby, means carried by and within the shield for yieldingly engaging a portion of said safe and thereby supporting the shield; an electrical contact carried by said yielding means; alarm mechanism in an electric circuit, said circuit controlled by said contact to actuate the alarm if theshield be tampered with.

44. The combination of a hollow, remov-, able and replaceable shield for receptacles, an alarm mechanism and an alarm circuit llU carried thereby within said shield, a permumovement of the shield away from the re- 10 tation lock switch, the tumblers of which are ceptacle to operate said alarm circuit. arranged within the shield and the manipu- In testimony whereof, I have signed my lating knob outside thereon, said switch bename to this specification, in the presence of ing adapted to render the alarm mechanism 1 two subscribing witnesses.

inoperative, a yielding switch contact mem- CLYDE J. COLEMAN.

ber having a portion engaging part of said v Witnesses: receptacle, said contact likewise controlling l W. J BIssING, the alarm circuit, and being movable by l D. HAROLD BUSH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

